RAN Handover Selection Using Performance Thresholds
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Solution Overview
Problem
Current 5G communication systems rely on Non-Standalone (NSA) implementations with 5G and 4G radio access networks (RANs), where handovers between 4G, 3G, and 5G RANs are not optimally managed, leading to suboptimal performance due to lack of efficient selection criteria for handover between these networks.
Innovation Solution
A telecommunication node, such as a Mobility Management Entity (MME), determines handovers between 3G and 5G RANs based on performance measurements, user preferences, and performance thresholds, selecting the RAN with better performance or meeting specific quality criteria to ensure seamless communication sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover selection between 3G and 5G RANs is based on basic 4G NSA implementation rules, then handover procedures can be executed, but the communication session quality is suboptimal due to lack of efficient selection criteria
Solution Approach 1:
The patent changes the selection parameters for handover by introducing performance measurements (signal strength, packet loss, latency) and thresholds that dynamically evaluate 3G and 5G RAN conditions. This allows the system to select the optimal RAN based on real-time performance parameters rather than following fixed handover rules, thereby improving communication session quality while maintaining manageable complexity through structured evaluation criteria.
2Reliability
If the system evaluates multiple performance metrics and preferences for RAN selection, then the quality of communication sessions improves, but the complexity of the selection process increases
Solution Approach 1:
The patent segments the handover selection process into distinct evaluation components: performance measurements (signal strength, packet loss, latency), thresholds, and preferences. By dividing the complex selection criteria into separate measurable parameters, the system can systematically evaluate each aspect independently and combine them to make an informed decision, improving session quality while keeping the selection process structured and manageable.
Solution Approach 2:
The patent implements feedback mechanisms by continuously monitoring performance measurements of both 3G and 5G RANs and using this information to make handover decisions. The system evaluates current performance metrics, compares them against thresholds and preferences, and adjusts handover selections based on this feedback loop, thereby optimizing communication session quality through data-driven decisions rather than static rules.
3Productivity
If handover decisions are made without performance thresholds and preferences, then the selection process is simple, but the network performance and user experience are suboptimal
Solution Approach 1:
The patent introduces specific performance parameters (signal strength, packet loss, latency) and thresholds to evaluate RAN conditions. By changing from simple handover rules to parameter-based evaluation, the system can optimize network performance through informed decisions about which RAN to select, while the structured nature of the parameter evaluation keeps the complexity manageable through systematic assessment criteria.
Data Source
AI summary
As described herein, one of a third generation (3G) radio access network (RAN) or a fifth generation (5G) RAN may be selected to receive a handover of a communication session from a fourth generation (4G) RAN. The 3G RAN or 5G RAN may be selected based on at least one of performance measurements for the 3G RAN and the 5G RAN, a preference for the 3G RAN or the 5G RAN, or a performance threshold for the 3G RAN or for the 5G RAN. The handover to the selected one of the 3G RAN or 5G RAN may then be initiated.